16006505 has 8 divisors (see below), whose sum is σ = 20043072. Its totient is φ = 12248368.

The previous prime is 16006499. The next prime is 16006513. The reversal of 16006505 is 50560061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16006505 - 2¹⁰ = 16005481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69479 + ... + 69708.

It is an arithmetic number, because the mean of its divisors is an integer number (2505384).

Almost surely, 2^16006505 is an apocalyptic number.

It is an amenable number.

16006505 is a deficient number, since it is larger than the sum of its proper divisors (4036567).

16006505 is a wasteful number, since it uses less digits than its factorization.

16006505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139215.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 16006505 is about 4000.8130423703. The cubic root of 16006505 is about 252.0183544622.

Adding to 16006505 its reverse (50560061), we get a palindrome (66566566).

The spelling of 16006505 in words is "sixteen million, six thousand, five hundred five".